Improvement in grate-bars



P. UMHDLTZ.

Grate-Bars.

NO. 144,372. Patented-Nov. 4, 1873.

Witnesses; Im/Znt NITED STATES 'PATENT OFFICE.

PHILIP UMHOLTZ, OF TREMONT, PENNSYLVANIA, ASSIGNOR OF ONE-HALF HIS RIGHT TO AUGUSTUS UMHOLTZ, OF SAME PLACE.

IMPROVEMENT IN GRATE-BARS.

Specification forming part of Letters Patent No. 144,372, dated November 4, 1873 application filed September 16, 1873.

i ments in Grate-Bars, of which the following is a specification:

The rst part of my invention relates to the construction of a flat-topped longitudinal or bearing bar in combination with cross-bars arranged and fastened diagonally across such bearing-bar and projecting, say, one inch above the same. By making` the top of the bearingbar dat or level, ashes lodge and are held upon it, and they protect the bar, to a considerable extent, from the heat from the burning fuel, and render it, therefore, more durable; and,

by arranging the cross or re bars diagonally across the bearing-bar, the scraper, when used to remove the ashes, is prevented from catching between them, as well as from removing the ashes which lodge in the longitudinal grooves which are made in their top surfaces,

as hereinafter described; and, by extending the upper surfaces of the fire-bars above the bearing-bar, space is furnished for the circulation of air between the top side of the bearin g-bar and the burning fuel resting on the firebars, and thus the bearing-bar is further protected from overheating and burning. The second part of my invention relates, in combination with such bearing-bar and the lirebars arranged diagonally across the same, to the making of such fire-bars with longitudinal grooves in their top surfaces to hold the ashes, to protect them from injury and burning resulting from the intense heat of the burning fuel, and the making of such re-bars with each of their ends free from other parts, to the end that when they expand or contract in heating and cooling they shall not crack or break themselves or other parts adjacent to them.

The third part of my invention relates to the construction of the firebars with longitudinal grooves in their top surfaces, and raised, with their top surfaces, an inch (more or less) higher than the bearing-bar, in combination with the latter-named bar, constructed as before described. l In the accompanying' drawing, Figure 1 represents a side view of a gratebar embracing my improvements. Fig. 2 represents a top or plan view of the same; and Fig. 3 represents a perspective view of a cross-section of the same, taken as indicated by the broken line a b in Fig. l.

It will appear from Fig. 3 that the fire-bars B increase in depth from their extremities toward their centers, which form affords them greater strength. They may be cast in the same piece with the bearing-bar A, or otherwise. In the same figure is shown how the lire-bars B extend above the bearing-bars, and in Figs. 1 and 2 is shown how they are arranged across that bar diagonally, and how their top surfaces are grooved, and how their extremities are left free, as before mentioned. The bars B, at each end of the carrying-bar A, are made to extend to as great a depth as that of the shoulders of that carrying-bar A, as shown to the left in Fig. 1. The outer ends of the last two inclined bars B, at each end of the grate-bar, are cut oif, andthe angular space left at the side of the inner end of the last inclined bar B is filled up with two short bars at right angles with the carrying-bar.

I am aware that in the patent of Thomas S.

Davis, dated 22d day of February, 1870, for improvement in grate-bars for furnaces, are shown ire bars arranged perpendicularly across a bearing-bar having a V-shaped top surface, and extending above that bar, and having their ends free; and that in the patent of John Vandecar, dated August ll, 1868, for a fire-grate, is shown a grate-bar composed of cross or fire bars diagonally arranged, and with longitudinal grooves in their top sides, but with their ends attached to adjoining long bars and their top edges ilush with the bearingbars 5 and that in the patent of Hawley Adams, dated April 2, 1867, for grates for furnaces, is shown a grate-bar composed of a plate of metal with openings arranged diagonally with respect to the sides of the plate, made atregular intervals, so as to result in the formation of flat diagonal bars, fast, of course, at each end, and flat on their tops; and therefore I do not claim any of these constructions; but

What I do claim as my invention is-- 1. The combination of the longitudinal bearing-bar A and the crosslbars B, Whether grooved 0r flat-topped, arranged diagonally across said bar A, and projecting above thel 3. The combination of the cross-bars B, having longitudinal grooves in their top surfaces, and projecting above the bearing-bar A, with that bearing-bar, substantially in the manner and for the purposes shown and described.

PHILIP UMHOLTZ.

Witnesses:

AUGUSTUS UMHoLTz, HENRY S. STORY. 

